November in Colwyn Bay is the rainiest and the cloudiest month of the year. In November, the weather in Colwyn Bay is typically warm. Average daily high temperature in November is about 10 degrees above zero. On average, Colwyn Bay has 20 rainy, 6 partly cloudy, 3 cloudy, and 1 sunny day in November. The rains are usually heavy. November as well as January, February, March, and April is considered the most uncomfortable time to visit Colwyn Bay.